diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c6e2918..7903fdc 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,16 +16,22 @@ jobs:
   test:
     name: Compile and test
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        # Every version pygame ships a prebuilt wheel for (see
+        # https://pypi.org/project/pygame/#files), matching requires-python
+        # in pyproject.toml. Anything outside this range would force a
+        # from-source build that fails on the runner (missing SDL/freetype
+        # dev headers), so the declared floor and the tested floor must
+        # stay in lockstep.
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
     steps:
       - uses: actions/checkout@v4
 
       - uses: actions/setup-python@v5
         with:
-          # Pinned rather than "3.x": pygame only ships prebuilt wheels up to
-          # cp313 (see https://pypi.org/project/pygame/#files), and installing
-          # on a newer interpreter forces a from-source build that fails on
-          # the runner (missing SDL/freetype dev headers).
-          python-version: "3.13"
+          python-version: ${{ matrix.python-version }}
 
       - name: Install package with test dependencies
         run: python -m pip install --upgrade pip && python -m pip install -e .[test]
diff --git a/README.md b/README.md
index 60d60f5..23a51d9 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,42 @@
 # Graphik
 This library assists developers with graphics programming.
 
+## Installation
+```bash
+pip install graphik
+```
+
+## Usage
+```python
+import pygame
+from preponderous.graphik import Graphik
+
+pygame.init()
+gameDisplay = pygame.display.set_mode((900, 600))
+graphik = Graphik(gameDisplay)
+
+graphik.drawRectangle(100, 100, 200, 50, Graphik.blue)
+graphik.drawText("Hello, world!", 200, 125, 24, Graphik.white)
+graphik.drawButton(100, 200, 200, 50, Graphik.green, Graphik.black, 24, "Click me", lambda: print("clicked"))
+graphik.drawImage("path/to/image.png", 100, 300, 200, 200)
+```
+
+Public `Graphik` methods:
+- `Graphik(gameDisplay=None)` — construct a helper bound to a pygame display surface (creates a default 900x600 window if none is given).
+- `getGameDisplay()` — returns the bound display surface.
+- `getVersion()` — returns the installed graphik version string.
+- `drawRectangle(xpos, ypos, width, height, color)`
+- `drawText(text, xpos, ypos, size, color)`
+- `drawButton(xpos, ypos, width, height, colorBox, colorText, sizeText, text, function)` — draws a rectangle and centered text, and calls `function()` on click.
+- `drawImage(filePath, xpos, ypos, width, height)`
+
+Color constants: `Graphik.black`, `Graphik.white`, `Graphik.red`, `Graphik.green`, `Graphik.blue`.
+
 ## Dependencies
 - pygame
 
 ## Projects
-[Projects that utilize this library](https://github.com/Preponderous-Software/Graphik/wiki/Projects)
+[Projects that utilize this library](https://github.com/Stephenson-Software/graphik/wiki/Projects)
 
 ## 📄 License
 
diff --git a/pyproject.toml b/pyproject.toml
index edd4279..42224b0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ name = "graphik"
 dynamic = ["version"]
 description = "Simple helper methods for graphics programming with pygame."
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 license = { text = "MIT" }
 authors = [{ name = "Daniel McCoy Stephenson" }]
 dependencies = ["pygame"]